... be tested by a series of testing or quality control machine The specification we can do is ... ,Grey,Black,Gold,Hyper silver,Hyper black,Gold-lip polished, Silver-lip polished,Chrome etc.International standards: SFI, TUV, ... should be tested by a series of testing or quality control machine, such as X-Ray machine,Rotary ... Also we have the flow forming producing capacity. High quality wheel 20x9 for car